How can tartar and plaque be removed from teeth without grinding? is there any paste, etc. for it?
The girders of a suspension bridge form an arc. The definition of an arc is a curve or bowed shape, like a part of a circle. An example of an arc is a rainbow. To arc is defined as to make a curved shape or move in a curved path.
Terms. 1  Arc - Two endpoints on a circle and all of the points on the circle between those two endpoints. 2  Center - The point from which all points on a circle are equidistant. 3  Central Angle - An angle whose vertex is the center of a circle.  Chord - A segment whose endpoints are on a circle.